E. Dudzik

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

Ferrimagnetic CoFe2O4 nanopillars embedded in a ferroelectric BaTiO3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe2O4/BaTiO3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.

Magnetic-field induced effects on the electric polarization in R MnO 3 ( R = Dy , Gd )

X-ray resonant magnetic scattering studies of rare-earth magnetic ordering were performed on perovskite manganites

Commensurate Dy magnetic ordering associated with incommensurate lattice distortion in multiferroic DyMnO{sub 3}

R{text{MnO}}_{3}(R=text{Dy},text{Gd})

Magnetic order and ferroelectricity in RMnO3 multiferroic manganites: coupling between R- and Mn-spins

in an applied magnetic field. The data reveal that the field-induced threefold polarization enhancement for

Origin of the reduced exchange bias in an epitaxial FeNi(111)/CoO(111) bilayer

mathbf{H}ensuremath{parallel}a(Hensuremath{approx}20text{ }text{kOe})

The new HMI beamline MAGS: an instrument for hard X-ray diffraction at BESSY.

observed in

Ga substitution as an effective variation of Mn-Tb coupling in multiferroic TbMnO 3

{text{DyMnO}}_{3}

Rare earth magnetism and ferroelectricity in RMnO3

below 6.5 K is due to a re-emergence of the Mn-induced Dy spin order with propagation vector

Complex charge ordering in CeRuSn

{ensuremath{tau}}^{text{Dy}}={ensuremath{tau}}^{text{Mn}}=0.385{mathbf{b}}^{ensuremath{ast}}

Crystal-to-stripe reordering of sodium ions in Na x CoO 2 ( x ⩾ 0.75 )

, which accompanies the suppression of the independent Dy magnetic ordering,